IAC fried?

[Drewkimble48]

93 gmc c1500 tbi 350
So I dropped in a new distributor and the truck started idling unstable. Became frustrated and took my truck to a shop.
I knew my old distributor was old and tired and was creating some idling issues is why I had decided to get a new one. The thing though is that the plug that goes over the idle screw on the throttle body was taken out. So after taking it to the shop and getting it back, it Idles better.
Well curious of what it was, the guy that worked on it told me that the timing plug was unplugged which I knew it was unplugged because I unplugged it to set timing and it was the only way it would run to the shop . what he did was plug it back in and adjusted the idle screw. Yes it runs better but, I am a little worried that it was just patched basically by adjusting the idle screw up to make it run better you know what I mean?
Also I think while I was trying to fix it, I think the IAC was fried because I saw it smoking in the throttle body cavity.
I just want to see what you guys think of this and if you guys think my IAC is fried.
Sorry If this doesn't make sense, I'm just alittle frustrated and in a hurry to write this because I'm at work.